fumika is getting ready to release her new single "Kesenai Yakusoku" on August 6. It's been revealed that NMB48 member Jo Eriko will be featured on the single's one-coin edition jacket cover.

"Kesenai Yakusoku" is currently being used as the theme song for Fuji TV's drama 'Ao no Umi ~LONG SUMMER~' which started on June 30. The collaboration was decided as Jo plays the role of heroine Mai when she was a young girl. On the jacket cover, Jo expresses the song's worldview with a tearful face. She commented, "I love the melody. I love it because it links with the drama."

In addition, the regular edition jacket cover feature actor Tokuyama Hidenori and comedian Ogata Takahiro, who also star in 'Ao no Umi ~LONG SUMMER~'. Like Jo, they can be seen shedding tears.